Automated Installation of DenyHost on RedHat/Fedora

#Script

#!/bin/bash

# This script installs Deny Host on RedHat(RHEL) or Fedora.

################################################################################

# This script comes with no warranty or guarantee. Please review the script

# before you run it to ensure that it will not cause adverse effects on your

# system.

#

# If you have any questions or comments, please e-mail: sanjaydalal4u@gmail.com

################################################################################

sudo echo

if [ -f /etc/init.d/denyhosts ]; then

echo Removing existing init scripts

sudo /etc/init.d/denyhosts stop

sudo rm -rf /etc/init.d/denyhosts

sudo chkconfig –remove denyhosts

echo ‘*********************’

echo

fi

if [ -d /usr/share/denyhosts/ ]; then

echo Removing existing installation

sudo rm -rf /usr/share/denyhosts

echo ‘*********************’

echo

fi

echo Installing ‘python’ and dependencies.

sudo yum -y install python

echo ‘*********************’

echo

cd /root

echo Downloading DenyHost

wget http://downloads.sourceforge.net/project/denyhosts/denyhosts/2.6/DenyHosts-2.6.tar.gz?use_mirror=biznetnetworks

echo ‘*********************’

echo

echo Unpacking DenyHost

#!/bin/bash

# This script installs Deny Host on RedHat(RHEL) or Fedora.

################################################################################

# This script comes with no warranty or guarantee. Please review the script

# before you run it to ensure that it will not cause adverse effects on your

# system.

# If you have any questions or comments, please e-mail: suresh.sonu2@gmail.com

################################################################################

sudo echo

if [ -f /etc/init.d/denyhosts ]; then

echo Removing existing init scripts

sudo /etc/init.d/denyhosts stop

sudo rm -rf /etc/init.d/denyhosts

sudo chkconfig –remove denyhosts

echo ‘*********************’

echo

fi

if [ -d /usr/share/denyhosts/ ]; then

echo Removing existing installation

sudo rm -rf /usr/share/denyhosts

echo ‘*********************’

echo

fi

echo Installing ‘python’ and dependencies.

sudo yum -y install python

echo ‘*********************’

echo

cd /root

echo Downloading DenyHost

wget http://downloads.sourceforge.net/project/denyhosts/denyhosts/2.6/DenyHosts-2.6.tar.gz?use_mirror=biznetnetworks

echo ‘*********************’

echo

echo Unpacking DenyHost

tar -xzf DenyHosts-2.6.tar.gz

cd /root/DenyHosts-2.6

echo ‘*********************’

echo

echo Installing DenyHost

sudo python setup.py install

echo ‘*********************’

echo

cd /usr/share/denyhosts

echo Configuring DenyHost

sudo cp denyhosts.cfg-dist denyhosts.cfg

sudo sed -i.bak ‘s/^\s*\(SECURE_LOG\s*=.*\)$/#\1/’ denyhosts.cfg

sudo sed -i.bak ‘s/^\s*#\s*SECURE_LOG\s*=\s*\/var\/log\/secure/SECURE_LOG = \/var\/log\/secure/’ denyhosts.cfg

sudo sed -i.bak ‘s/^\s*\(LOCK_FILE\s*=.*\)$/#\1/’ denyhosts.cfg

sudo sed -i.bak ‘s/^\s*#\s*LOCK_FILE\s*=\s*\/var\/run\/denyhosts.pid/LOCK_FILE = \/var\/run\/denyhosts.pid/’ denyhosts.cfg

sudo sed -i.bak ‘s/^\s*\(BLOCK_SERVICE\s*=.*\)$/#\1/’ denyhosts.cfg

sudo sed -i.bak ‘s/^\s*#\s*BLOCK_SERVICE\s*=\s*ALL/BLOCK_SERVICE  = ALL/’ denyhosts.cfg

echo ‘*********************’

echo

echo Configuring executable

sudo cp daemon-control-dist daemon-control

sudo sed -i.bak ‘s/^\(\s*DENYHOSTS_BIN\s*=\s\).*$/\1″\/usr\/bin\/denyhosts.py”/’ daemon-control

sudo sed -i.bak ‘s/^\(\s*DENYHOSTS_LOCK\s*=\s\).*$/\1″\/var\/run\/denyhosts.pid”/’ daemon-control

sudo sed -i.bak ‘s/^\(\s*DENYHOSTS_CFG\s*=\s\).*$/\1″\/usr\/share\/denyhosts\/denyhosts.cfg”/’ daemon-control

sudo chown root daemon-control

sudo chmod 700 daemon-control

echo ‘*********************’

echo

echo Adding ddclient to rc scripts

cd /etc/init.d

sudo ln -s /usr/share/denyhosts/daemon-control denyhosts

sudo chkconfig –add denyhosts

sudo chkconfig –level 35 denyhosts on

echo ‘*********************’

echo

CentOS5/RHEL5 User Administration

1) Add User

2)      Delete user

3)      Modify user

4) Add Group

5) Delete group

6) Modify group

7) Add User to Group

Use useradd command to add new users to existing group (or create a new group and then add user). If group does not exist, create it. Syntax:

Syntax:

useradd -G {group-name1},{group-name2} username (for secondary group)

useradd -g {group-name} username (for primary group)

Mysql database Backup Script

#!/bin/bash

MYSQL=`which mysql`             #mysql version

MYSQLDUMP=`which mysqldump`     #mysqldump file

HOSTNAME=`hostname`             #hostname of backup server

USERNAME=”username”                 #mysql server user

PASSWORD=”password”            #mysql user password

LOCALSERVER=”localhost”         #mysql local server name

BACKUPDIRECTORY=/root/mysqldbbackup     #backup directory where backup is stored

NOW=”$(date +”%d-%m-%Y”)”               #Backup file format

DATATBASELIST=”"                        #Mysql database list

IGNOREDATABASE=”exampledb”                  #Ignore database not to be include in backup

GZIP=`which gzip`                       #Gzip to compress the backup file

FILENAME=”"                             #Database backup file names

#store the database list in DATABASELIST

DATABASELIST=`$MYSQL -u $USERNAME -h $LOCALSERVER -p$PASSWORD -Bse ‘show databases’`

#Fetch database on by one and take a backup

for db in $DATABASELIST

do

        skipdatabase=-1

        if [ "$IGNOREDATABASE" != "" ]; then

                for i in $IGNOREDATABASE        #check the ignore database list

                do

                        if [ "$db" = "$i" ]; then

                                skipdatabase=1        #it will skip this database and move to second database list

                        fi

                done

        fi

        if [ "$skipdatabase" = "-1" ]; then

                FILE=”$BACKUPDIRECTORY/$db.$HOSTNAME.$NOW.gz” #Backup file format & Backup directory

                #ALL in one command to take backup & compress the backup file

 $MYSQLDUMP -u $USERNAME -h $LOCALSERVER -p$PASSWORD $db | $GZIP -9 > $FILE